308 lines
7.4 KiB
C
308 lines
7.4 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "gtkhbox.h"
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static void gtk_hbox_class_init (GtkHBoxClass *klass);
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static void gtk_hbox_init (GtkHBox *box);
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static void gtk_hbox_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_hbox_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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guint
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gtk_hbox_get_type ()
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{
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static guint hbox_type = 0;
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if (!hbox_type)
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{
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GtkTypeInfo hbox_info =
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{
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"GtkHBox",
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sizeof (GtkHBox),
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sizeof (GtkHBoxClass),
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(GtkClassInitFunc) gtk_hbox_class_init,
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(GtkObjectInitFunc) gtk_hbox_init,
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(GtkArgSetFunc) NULL,
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(GtkArgGetFunc) NULL,
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};
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hbox_type = gtk_type_unique (gtk_box_get_type (), &hbox_info);
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}
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return hbox_type;
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}
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static void
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gtk_hbox_class_init (GtkHBoxClass *class)
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{
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GtkWidgetClass *widget_class;
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widget_class = (GtkWidgetClass*) class;
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widget_class->size_request = gtk_hbox_size_request;
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widget_class->size_allocate = gtk_hbox_size_allocate;
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}
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static void
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gtk_hbox_init (GtkHBox *hbox)
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{
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}
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GtkWidget*
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gtk_hbox_new (gint homogeneous,
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gint spacing)
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{
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GtkHBox *hbox;
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hbox = gtk_type_new (gtk_hbox_get_type ());
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GTK_BOX (hbox)->spacing = spacing;
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GTK_BOX (hbox)->homogeneous = homogeneous ? TRUE : FALSE;
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return GTK_WIDGET (hbox);
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}
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static void
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gtk_hbox_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GtkBox *box;
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GtkBoxChild *child;
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GList *children;
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gint nvis_children;
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gint width;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_HBOX (widget));
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g_return_if_fail (requisition != NULL);
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box = GTK_BOX (widget);
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requisition->width = 0;
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requisition->height = 0;
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nvis_children = 0;
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children = box->children;
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while (children)
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{
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child = children->data;
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children = children->next;
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if (GTK_WIDGET_VISIBLE (child->widget))
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{
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gtk_widget_size_request (child->widget, &child->widget->requisition);
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if (box->homogeneous)
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{
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width = child->widget->requisition.width + child->padding * 2;
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requisition->width = MAX (requisition->width, width);
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}
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else
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{
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requisition->width += child->widget->requisition.width + child->padding * 2;
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}
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requisition->height = MAX (requisition->height, child->widget->requisition.height);
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nvis_children += 1;
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}
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}
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if (nvis_children > 0)
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{
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if (box->homogeneous)
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requisition->width *= nvis_children;
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requisition->width += (nvis_children - 1) * box->spacing;
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}
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requisition->width += GTK_CONTAINER (box)->border_width * 2;
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requisition->height += GTK_CONTAINER (box)->border_width * 2;
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}
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static void
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gtk_hbox_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkBox *box;
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GtkBoxChild *child;
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GList *children;
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GtkAllocation child_allocation;
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gint nvis_children;
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gint nexpand_children;
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gint child_width;
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gint width;
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gint extra;
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gint x;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_HBOX (widget));
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g_return_if_fail (allocation != NULL);
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box = GTK_BOX (widget);
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widget->allocation = *allocation;
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nvis_children = 0;
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nexpand_children = 0;
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children = box->children;
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while (children)
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{
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child = children->data;
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children = children->next;
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if (GTK_WIDGET_VISIBLE (child->widget))
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{
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nvis_children += 1;
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if (child->expand)
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nexpand_children += 1;
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}
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}
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if (nvis_children > 0)
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{
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if (box->homogeneous)
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{
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width = (allocation->width -
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GTK_CONTAINER (box)->border_width * 2 -
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(nvis_children - 1) * box->spacing);
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extra = width / nvis_children;
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}
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else if (nexpand_children > 0)
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{
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width = allocation->width - widget->requisition.width;
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extra = width / nexpand_children;
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}
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else
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{
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width = 0;
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extra = 0;
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}
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x = allocation->x + GTK_CONTAINER (box)->border_width;
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child_allocation.y = allocation->y + GTK_CONTAINER (box)->border_width;
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child_allocation.height = allocation->height - GTK_CONTAINER (box)->border_width * 2;
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children = box->children;
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while (children)
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{
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child = children->data;
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children = children->next;
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if ((child->pack == GTK_PACK_START) && GTK_WIDGET_VISIBLE (child->widget))
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{
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if (box->homogeneous)
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{
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if (nvis_children == 1)
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child_width = width;
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else
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child_width = extra;
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nvis_children -= 1;
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width -= extra;
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}
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else
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{
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child_width = child->widget->requisition.width + child->padding * 2;
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if (child->expand)
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{
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if (nexpand_children == 1)
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child_width += width;
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else
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child_width += extra;
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nexpand_children -= 1;
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width -= extra;
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}
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}
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if (child->fill)
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{
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child_allocation.width = child_width - child->padding * 2;
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child_allocation.x = x + child->padding;
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}
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else
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{
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child_allocation.width = child->widget->requisition.width;
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child_allocation.x = x + (child_width - child_allocation.width) / 2;
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}
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gtk_widget_size_allocate (child->widget, &child_allocation);
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x += child_width + box->spacing;
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}
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}
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x = allocation->x + allocation->width - GTK_CONTAINER (box)->border_width;
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children = box->children;
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while (children)
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{
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child = children->data;
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children = children->next;
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if ((child->pack == GTK_PACK_END) && GTK_WIDGET_VISIBLE (child->widget))
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{
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if (box->homogeneous)
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{
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if (nvis_children == 1)
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child_width = width;
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else
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child_width = extra;
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nvis_children -= 1;
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width -= extra;
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}
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else
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{
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child_width = child->widget->requisition.width + child->padding * 2;
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if (child->expand)
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{
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if (nexpand_children == 1)
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child_width += width;
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else
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child_width += extra;
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nexpand_children -= 1;
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width -= extra;
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}
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}
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if (child->fill)
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{
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child_allocation.width = child_width - child->padding * 2;
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child_allocation.x = x + child->padding - child_width;
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}
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else
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{
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child_allocation.width = child->widget->requisition.width;
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child_allocation.x = x + (child_width - child_allocation.width) / 2 - child_width;
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}
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gtk_widget_size_allocate (child->widget, &child_allocation);
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x -= (child_width + box->spacing);
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}
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}
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}
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}
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